Chevrolet Silverado / GMC Sierra. Service manual — part 766

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE
ASSEMBLY REPLACEMENT

2

Tighten: 8 N.m (71 lb in)

NOTE:

Refer to Fastener Notice .

3

Manual Shift Shaft Position Switch Assembly
Procedure:
Align the switch activator slide with the manual valve link.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 81: Control Solenoid Valve and Transmission Control Module Assembly
Replacement
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures:
Remove the control valve body assembly. Refer to Control Valve Lower Body and
Upper Body Replacement.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

CONTROL VALVE LOWER BODY AND UPPER BODY REPLACEMENT

1

Manual Shift Shaft Position Switch Assembly Electrical Connector
Tip: Release the connector lock before disconnecting. Engage the connector
lock after connecting.

2

Control Module Assembly Heat Sink Bolt (Qty: 2)

Tip: Tighten in specified sequence.

Tighten: 8 N.m (71 lb in)

NOTE:

Refer to Fastener Notice .

3

Control Solenoid Valve Assembly Bolt (Qty: 4)
Tip: Tighten in specified sequence.

Tighten: 8 N.m (71 lb in)

4

Control Solenoid Valve Assembly Bolt (Qty: 5)
Tip: Tighten in specified sequence.

Tighten: 8 N.m (71 lb in)

5

Control Solenoid Valve and Module Assembly

Procedure

1. Inspect the 4 filter plate retaining tabs. A broken tab may not adequately

secure the filter plate to the control solenoid valve assembly.

2. Align the control solenoid valve assembly with the lower valve body

locator pin when assembling.

3. Reset the transmission adaptive pressure (TAP) values. Refer to Service

Fast Learn Adapts.

6

Filter Plate
Tip: Discard filter plate and replace with new.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 82: Control Valve Lower Body and Upper Body Replacement
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures:
Remove the transmission electrical connector. Refer to Automatic Transmission
Electrical Connector Passage Sleeve Replacement.

1

Manual Shaft Detent Bolt

Tighten: 12 N.m (106 lb in)

NOTE:

Refer to Fastener Notice .

2

Manual Shaft Detent Assembly

3

Control Valve Assembly Bolt (Qty: 6)

Procedure

Do not remove all the bolts in the control valve body assembly. Remove
only the bolts indicated.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado